Lipids

, Volume 45, Issue 1, pp 21–27

Dietary Source of Stearidonic Acid Promotes Higher Muscle DHA Concentrations than Linolenic Acid in Hybrid Striped Bass

  • Anant S. Bharadwaj
  • Steven D. Hart
  • Billie J. Brown
  • Yong Li
  • Bruce A. Watkins
  • Paul B. Brown
Original Article

DOI: 10.1007/s11745-009-3372-9

Cite this article as:
Bharadwaj, A.S., Hart, S.D., Brown, B.J. et al. Lipids (2010) 45: 21. doi:10.1007/s11745-009-3372-9

Abstract

Rapid expansion of aquacultural production is placing increasing demand on fish oil supplies and intensified the search for alternative lipid sources. Many of the potential alternative sources contain low concentrations of long chain n-3 fatty acids and the conversion of dietary linolenic acid to longer chain highly unsaturated fatty acids is a relatively inefficient process in some species. A 6-week study was conducted to compare tissue fatty acid (FA) concentrations in hybrid striped bass fed either 18:3n-3 (α-linolenic acid; ALA) or 18:4n-3 (stearidonic acid; SDA). Hybrid striped bass were fed either a control diet containing fish oil, or diets containing ALA or SDA at three different levels (0.5, 1 and 2% of the diet). There were no significant differences in whole animal responses between fish fed ALA or SDA. Liver and muscle concentrations of ALA and SDA were responsive to dosages fed. However, only 22:6n-3 concentrations in muscle were significantly affected by dietary source of 18 carbon precursors. Muscle 22:6n-3 concentrations were significantly higher in fish fed SDA compared to fish fed ALA. Based on these data, it appears that feeding SDA can increase long chain n-3 fatty acid concentrations in fish muscle.

Keywords

Hybrid striped bass Fish Muscle Stearidonic acid Linolenic acid 

Abbreviations

ALA

Linolenic acid

ANOVA

Analysis of variance

AA

Arachidonic acid

DHA

Docosahexaenoic acid

DPA

Docosapentaenoic acid

EPA

Eicosapentaenoic acid

EFA

Essential fatty acid

FAME

Fatty acid methyl esters

FA

Fatty acid

FID

Flame ionization detector

GC

Gas chromatograph

HUFA

Highly unsaturated fatty acid

IPF

Intraperitoneal fat

LC-n-3 HUFA

Long chain n-3 highly unsaturated fatty acids

MONO

Total monounsaturated fatty acids

PSEM

Pooled standard error of the mean

RLW

Relative liver weight

SAT

Total saturated fatty acid

SDA

Stearidonic acid

Copyright information

© AOCS 2009

Authors and Affiliations

  • Anant S. Bharadwaj
    • 1
    • 3
  • Steven D. Hart
    • 1
    • 4
  • Billie J. Brown
    • 1
  • Yong Li
    • 2
  • Bruce A. Watkins
    • 2
  • Paul B. Brown
    • 1
  1. 1.Department of Forestry and Natural ResourcesPurdue UniversityWest LafayetteUSA
  2. 2.Lipid Chemistry and Molecular Biology Laboratory, Department of Basic Medical SciencePurdue UniversityWest LafayetteUSA
  3. 3.Novus InternationalSt. CharlesUSA
  4. 4.Indiana Soybean AllianceIndianapolisUSA

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